If God told you that the tables were turned, and sinning was now the only way to get to heaven, and doing good things would send you to hell, how would you live your life? Obeying God and going to heaven, or being a good person?

(PS the Bible says you should do the whole 'obey God' thing; see the story of Abraham & Isaac, among others)

You can't claim killing your own child is wrong on Biblical principles: Abraham & Isaac, Deuteronomy 21:18-21, 1 Samuel 15:3 (Do not spare them; put to death men and women, children and infants), Deuteronomy 7:1-11 (when the Lord your God has delivered them over to you and you have defeated them, then you must destroy them totally), etc.

goes a little like so: Think not that I am come to bring peace, I have not come to bring peace, nay; a sword. I am come to bring division, to divide the five into two and three. The father against son, and son against father, the mother against daughter and daughter against mother. Man's enemy shall be they of his own household. He who loveth son more than me, is not worthy of me! He who loveth daughter more than me, is not worthy of me!

The idea of loving god with all your might sounds quite lovely when it doesn't sound like matthew 10:34